#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>

int main()
{
	unsigned int n = 0;
	scanf("%d", &n);//-1
	int count = 0;
	while (n)
	{
		if (n % 2 == 1)
			count++;
		n /= 2;
	}
	printf("%d\n", count);

	return 0;
}

